Description of problem:

sagemath's classic notebook doens't work in Fedora 29 (bug 1640890), so after
finally convincing sagemath to export my old documents in the form of
Jupyter based notebooks (bug 1663158), i had hope that I could finally get
back to my work.

Unfortunately the Sagemath Jupyter kernel is missing.


Version-Release number of selected component (if applicable):

sagemath.x86_64                        8.3-1.fc29
sagemath-jupyter.noarch                N/A


How reproducible:

Every time.


Steps to Reproduce:
1. Install sagemath and all missing dependencies (bugs 1464520, 1636759, 1657825)
2. Then try to launch sage: "sage -n jupyter"
3. Notice a jupyter shell start in the browser, but only Python2 and Python3 is available in the 'kernel' drop down.


Actual results:
The Sagemath kernel is not available in the newly launched Jupuyter shell. Only standard kernels like Python2 and Python3 are available.



Additional info:
Arch-linux and debian have an additional package that provide the Sagemath Jupyter kernel: sagemath-jupyter.noarch
That package is not available in Fedora and the files it provide is not available in other packages:

> dnf provides /usr/share/jupyter/kernels/sagemath
> dnf provides /usr/share/jupyter/kernels/sagemath/kernel.json

return nothing.